Power your camera continually, and without interruption, with the Tether Tools Case Relay Camera Power System Kit from B&H which bundles in a coupler for connection to select Sony cameras that use NP-FW50 battery packs. Equipped with a built-in 7.4V, 1,200mAh lithium battery and a 5 VDC input via USB, this system will provide power, while being connected to an external power source for a nearly constant source. When connected to a 2A USB battery pack or an AC adapter, the Case Relay can still be able to provide a constant supply of power to your camera, and thanks to the internal battery the system will support hot swapping of external power sources. An LED indicator light will shift from green to yellow to red to show battery percentage so that you will not accidentally lose power during a long time lapse or video production.

Tether Tools Case Relay Camera Power System

Power your camera continually, and without interruption, with the Case Relay Camera Power System from Tether Tools. Equipped with a built-in 7.4V, 1,200mAh lithium battery and a 5 VDC input via USB, this system will provide power, while being connected to an external power source for a nearly constant source. When connected to a 2A USB battery pack or an AC adapter, the Case Relay can still be able to provide a constant supply of power to your camera, and thanks to the internal battery the system will support hot swapping of external power sources. An LED indicator light will shift from green to yellow to red to show battery percentage so that you will not accidentally lose power during a long time lapse or video production. This system is compatible with numerous camera systems through the use of a separately available coupler. This coupler fits into the battery compartment of your camera and acts as a dummy battery to supply power.

Pair your select Sony camera to the Case Relay System with this Relay Camera Coupler from Tether Tools. In this case, it takes the place of the NP-FW50-type battery pack and provides a connection to the power source for long-term, continuous operation of your camera. This setup can easily be swapped out with another coupler to provide you with compatibility across camera systems.

Case Relay Camera Power System Kit with Coupler for Sony Cameras with NP-FW50 Battery is rated
4.4 out of
5 by
10.

Rated 5 out of
5 by
tubester from
Seems to work very well on my Sony A7S IIThis unit plugs into the battery compartment of my Sony A7S II. I use a USB power supply to power this and it runs for hours, perhaps 4 hours. I haven't tested it yet on a real video gig but I'm hopeful this will do the trick. If you already have a USB battery pack then just plug this think into it and put the dummy battery into your compatible Sony camera.

Date published: 2016-09-21

Rated 3 out of
5 by
newadam from
Not sure what I think yet..A little mixed on this. Seems to work well, but does not last as long as I hoped and has a few times quit when plugged into wall. Not sure if it is discharging quicker than the USB charger powers it. Battery than the internal battery. And it may be the Sony A7SII reading a low battery and shutting off. I need to test some more to see where the problem lies.

Date published: 2017-01-25

Rated 4 out of
5 by
Michael the Manager from
Longer CableThis product worked great for a custom install of an overhead camera setup, but I had to get creative to make it reach because the cable was pretty short. The camera I purchased came with power block, but I would not have minded the price of this product being a few dollars higher to include a power brick. Overall great product!

Date published: 2017-06-06

Rated 5 out of
5 by
Anonymous from
Really Smart. So Helpful.This product is incredibly smart. It works so well, and even comes with the internal battery charged. I love the freedom it gives you. Partnered with a high capacity battery pack (external battery) it is an awesome workhorse. It gives me a lot of time to use my camera without having to recharge small batteries.

Date published: 2016-08-09

Rated 5 out of
5 by
Nathan from
System works perfectly!Well packaged, very straightforward to use. I love that it holds an internal charge allowing you to hotswap batteries while still shooting. I've been using it for night timelapses. I can just set my intervalometer, plug in the case relay and go to sleep while my camera shoots all night long.

Date published: 2016-10-05

Rated 5 out of
5 by
juan from
yes i would buy it againwhen i bought my a7sii i thought why would i purchase this if i can feed my camera power through usb? well, i need my multi terminal usb port free for other things and this unit is a must, and works perfect!

Date published: 2017-04-30

Rated 5 out of
5 by
Sazdal from
Great solutionAs every sony a7s owner I have problems dealing with poor battery life. This system works perfect for using external batteries with the camera and stop suffering for ridiculous battery life.

Date published: 2016-06-10

Rated 4 out of
5 by
Matt from
Most versatile option out there5 stars for functionality but this could easily be sold for half the price. It's a glorified plastic charger...